Yes, it can be, lack of imagination on my part. As others pointed out, though, if it always gets stuck in a 4-2-1 loop, that would mean that every "program" te

Yes, it can be, lack of imagination on my part. As others pointed out, though, if it always gets stuck in a 4-2-1 loop, that would mean that every "program" terminates, which would imply that the language isn't Turing-complete.